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Contents
class String
def self.bra2ket
@bra2ket ||= { '['=>']', '('=>')', '{'=>'}', '<'=>'>' }
end
# Return a new string embraced by given brakets.
# If only one bracket char is given it will be placed
# on either side.
#
# "wrap me".bracket('{') #=> "{wrap me}"
# "wrap me".bracket('--','!') #=> "--wrap me!"
#
def bracket(bra, ket=nil)
#ket = String.bra2ket[$&] if ! ket && /^[\[({<]$/ =~ bra
ket = String.bra2ket[bra] unless ket
"#{bra}#{self}#{ket ? ket : bra}"
end
# Inplace version of #braket.
def bracket!(bra, ket=nil)
self.replace( self.bracket(bra, ket) )
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCString < Test::Unit::TestCase
def test_bracket
assert_equal( '#X#', 'X'.bracket('#') )
assert_equal( 'xX!', 'X'.bracket('x','!') )
assert_equal( '{X}', 'X'.bracket('{','}') )
assert_equal( '<X>', 'X'.bracket('<') )
assert_equal( '(X)', 'X'.bracket('(') )
assert_equal( '[X]', 'X'.bracket('[') )
assert_equal( '{X}', 'X'.bracket('{') )
end
def test_braket!
a = 'X' ; a.bracket!('#')
assert_equal( '#X#', a )
a = 'X' ; a.bracket!('x','!')
assert_equal( 'xX!', a )
a = 'X' ; a.bracket!('{','}')
assert_equal( '{X}', a )
a = 'X' ; a.bracket!('<')
assert_equal( '<X>', a )
a = 'X' ; a.bracket!('(')
assert_equal( '(X)', a )
a = 'X' ; a.bracket!('[')
assert_equal( '[X]', a )
a = 'X' ; a.bracket!('{')
assert_equal( '{X}', a )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems